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저감속 회수장비 시험조건에 따른 초음속 시험탄 감속특성에 대한 수치해석적 연구
송민섭,김재훈,Song, Minsup,Kim, Jaehoon 한국군사과학기술학회 2020 한국군사과학기술학회지 Vol.23 No.5
Numerical analyses were performed using a one-dimensional Euler equation and Godunov Harten-Lax-Van Leer(HLL) Riemann solver in order to study the deceleration characteristics of a 155 mm projectile in a soft recovery system. The soft recovery system consisting of a series of pressure tubes is a system that decelerates the test projectile fired at supersonic speed using a high-pressure gas and filled water inside. Therefore, depending on the gas pressure and the amount of water filling, the deceleration and the exit velocity of the test projectile inside the pressure tube are determined. In this paper, the deceleration characteristics of the test projectile were analyzed according to the gas pressure and water mass filled.
송민섭(Min-sup Song),강선예(Sun-ye Kang),박준수(June-soo Park),손갑헌(Gap-heon Sohn) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.11
DMWs are common feature of the PWR in the welded connections between carbon steel and stainless steel piping. The nickel-based weld metal, Alloy 82/182, is used for welding the dissimilar metals and is known to be susceptible to PWSCC. A round-robin program has been implemented to benchmark the numerical simulation of the transient temperature and weld residual stresses in the DMWs. To solve the round-robin problem related to Pressurizer Safety & Relief nozzle, the thermal elasto-plastic analysis is performed in the DMW by using the FEM. The welding includes both the DMW of the nozzle to safe-end and the SMW of the safe-end and piping. Major results of the analyses are discussed: The axial and circumferential residual stresses are found to be -88㎫(225㎫) and -38㎫(293㎫) on the inner surface of the DMW; where the values in parenthesis are the residual stresses after the DMW. Thermo-mechanical interaction by the SMW has a significant effect on the residual stress fields in the DMW.
증예(症例) : 항결핵제 투여후 발생한 전격성 간염 1예
송민섭 ( Min Seop Song ),황민호 ( Min Ho Hwang ),윤찬호 ( Chan Ho Yun ),김용문 ( Yong Mun Kim ),김정화 ( Jeoung Hwa Kim ),조덕수 ( Deok Su Cho ),김귀완 ( Kwi Wan Kim ) 전북대학교 의과학연구소 2001 全北醫大論文集 Vol.25 No.1
항결핵제는 황달을 포함한 전격성 간염에 이르기까지 다양한 정도의 간기능 이상을 초래할 수 있는데 INH, PZA에서 비교적 흔하고 INH와 RFP을 동시에 투여할 때 간독성의 상승효과가 있다. 저자등은 바이러스성 및 자가면역성 간질환이 배제되었고, 다른 독성 물질에 노출된 적이 없었던 4제 병용 투여환자에서 발생한 전격성 간염 1 예를 경험하였기에 문헌고찰과 함께 이를 보고하는 바이다. Idiosyncratic drug reactions may cause fulminant hepatic failure. The most frequent culprits are anaesthetic agents, non-steroidal anti-inflammatory drugs and isoniazid given with rifampicin. In approximately 10 percent of adults treated with the antituberculous drug isoniazid, elevated serum aminotransferase levels develop during the first few weeks of therapy. We report a twenty six year-old male patient with fulminant hepatitis due to antituberculous drugs (isoniazid, rifampicin, ethambutol, pyrazinamide), He, previously having been well, typically develops non-specific symptoms-nausea, malaise and showed jaundice. He suffered from uncontrolled ascites and pleural effusion. Viral hepatitis and alcoholic hepatitis were excluded from his history and serological study data. After changing of antituberculous drugs and with conservative care, he was discharged with improved clinical condition.
송민섭(Min-Sup Song),김연충(Yuen Chung Kim) 한국철도학회 2016 한국철도학회 학술발표대회논문집 Vol.2016 No.5
철도 차량용 보조전원장치 (APS, Auxiliary Power Supply)는 차량에 필요한 전원을 공급하는 핵심적인 전장품으로써 차량 편성에 따라 2대 이상으로 구성되어 독립적으로 운영된다. 일부 APS에 고장 발생 시 정상 운영 중인 APS가 연장 급전을 통해서 고장이 발생한 APS의 부하에 임시적으로 전원을 공급할 때 까지 전원이 일시적으로 차단되어 승객에 불편을 초래한다. 본 논문에서는 이러한 문제점을 해결하기 위해서 2대 이상의 APS가 상시 병렬 운전을 하여 끊김없는 전원 공급을 할 수 있는 APS 병렬 운전 알고리즘에 대해서 연구하였다. 병렬 운전을 위한 통신 및 외부 제어 부담을 최소화 하기 위해 간단하고 효과적인 제어 알고리즘을 제안하고, PSIM 시뮬레이션으로 타당성을 검증하였다. Auxiliary power supply (APS) for railway vehicle, consisting of more than two subs, is the key electric component for supplying electric power of vehicle. When one of APS fails, fault one is stopped and disunited from vehicle load. During the extension of power from remaining normal APS, passengers have to endure inconvenience due to temporarily blocked electric power. In this paper, the simple parallel synchronous operation algorithm for APS was propose, with which All APS can operated in parallel at all times resulting seamless power supply to load even during failure of some APS. For minimizing the communication and other external control efforts to implement synchronous operation, simple but effective control algorithm was suggested and verified by PSIM simulation.